1、BRITISH STANDARD AEROSPACE SERIES BS EN 2545-1:1995 Titanium and titanium alloy remelting stock and castings Technical specification Part 1: General requirements The European Standard EN 2545-1:1995 has the status of a British Standard ICS 49.040.10BSEN2545-1:1995 This British Standard, having been
2、prepared under the directionof the Engineering SectorBoard, was publishedunderthe authority ofthe Standards Board and comes into effect on 15October1995 BSI 12-1999 The following BSI references relate to the work on this standard: Committee reference ACE/61 Draft for comment 91/77415 DC ISBN 0 580 2
3、4080 0 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee ACE/61, Inspection and testing requirements for aerospace metallic materials, upon which the following bodies were represented: Aluminium Federation British Forging I
4、ndustry Association British Investment Casting Association British Iron and Steel Producers Association British Steel Industry Copper Development Association Light Metal Founders Association Ministry of Defence Seamless Steel Tube Association Society of British Aerospace Companies Ltd. Amendments is
5、sued since publication Amd. No. Date CommentsBSEN2545-1:1995 BSI 12-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN 2545-1 3 List of references Inside back coverBSEN2545-1:1995 ii BSI 12-1999 National foreword This British Standard has been p
6、repared under the direction of Technical Committee ACE/61 and is the English language version of EN2545-1:1995 Aerospace series Titanium and titanium alloy remelting stock and castings Technical specification Part 1: General requirements, published by the European Committee for Standardization (CEN)
7、. EN 2545-1 was produced as a result of international discussions in which the United Kingdom took an active part. Cross-references The British Standards corresponding to the European Standards referred to in the text are identical in number and title to those given in clause2. A British Standard do
8、es not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an ins
9、ide front cover, pages i and ii, theEN title page, pages 2 to 8, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPE
10、NNE EUROPISCHE NORM EN 2545-1 May 1995 ICS 49.040.10 Descriptors: Aircraft industry, titanium, titanium alloy, forging, casting, melting, specification, generalities English version Aerospace series Titanium and titanium alloy remeltingstock and castings Technical specification Part1:General require
11、ments Srie arospatiale Produits pour refusion et pices moules en titane et alliages de titane Spcification technique Partie1:Exigences gnrales Luft- und Raumfahrt Vormaterial und Gustcke aus Titan und Titanlegierungen Technische Lieferbedingungen Teil 1: Allgemeine Anforderungen This European Standa
12、rd was approved by CEN on 1994-11-25. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such n
13、ational standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and
14、 notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United K
15、ingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1995 Copyright reserved to CEN members Ref. No. EN 2545-1:1995 EEN2545-1:1995 BSI 12-1999 2 Foreword This European Standard has be
16、en prepared by the European Association of Aerospace Manufacturers(AECMA). After inquiries and votes carried out in accordance with the rules of this Association, this Standard has successively received the approval of the National Associations and the Official Services of the member countries of AE
17、CMA, prior to its presentation toCEN. This European Standard shall be given the status of a national standard either by publication of an identical text or by endorsement, at the latest by November1995, and conflicting national standards shall be withdrawn at the latest by November1995. According to
18、 the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Contents Page
19、Foreword 2 1 Scope 3 2 Normative references 3 3 Definitions 3 4 Quality assurance 4 5 Manufacture 4 6 Traceability 4 7 Freedom from defects 4 8 Testing 4 9 Marking 5 10 Acceptance 5 11 Inspection and test report 5 12 Packaging 6 13 Wording of orders 6 Annex A (normative) Sketch to illustratedefiniti
20、ons 7 Table 1 4EN2545-1:1995 BSI 12-1999 3 1 Scope This standard specifies the general requirements for the manufacture, inspection and testing of remelting stock intended for the production of castings in titanium and titanium alloys. Particular requirements are defined in EN2545-2 and EN2545-3. Th
21、is standard shall be applied in conjunction with EN material standards unless otherwise specified on the drawing, order or inspection schedule. By agreement between the manufacturer and the purchaser it may also be applied to other materials or delivery conditions not covered by EN standards. This a
22、greement shall be formalised by reference to this standard on the drawing, order or inspection schedule. 2 Normative references This European Standard incorporates by dated or undated reference provisions from other publications. These normative references are cited at the appropriate places in the
23、text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to app
24、lies. EN 2000, Aerospace series Quality assurance EN aerospace product Approval of the quality system of manufacturers. EN 2078, Aerospace series Metallic materials Manufacturing schedule Inspection schedule Inspection and test report Description and rules for use. EN 2545-2, Aerospace series Titani
25、um and titanium alloy remelting stock and castings Technical specification Part2:Remelting stock. EN 2545-3, Aerospace series Titanium and titanium alloy remelting stock and castings Technical specification Part 3:Pre-production and production castings. 3 Definitions For the purposes of this standar
26、d, the following definitions apply: The chart given inAnnex A completes the following definitions. 3.1 charge different products that make up a furnace charge to be melted in order to obtain a parent-cast or castings 3.2 melt a mass of homogeneous liquid metal from a single charge 3.3 remelt solid m
27、etal resulting from a single melt 3.4 parent-cast a cast of remelting stock to be used for the production of castings 3.5 remelting stock metal supplied in cast or wrought form, the composition of which has been established by chemical analysis 3.6 casting a part manufactured by vacuum arc remelting
28、(VAR) or electron beam melting (EBM) 3.7 pre-production castings castings produced to a particular procedure which qualify the method of manufacture and mould configuration and demonstrate that the requirements of the purchaser can be met 3.8 Batches 3.8.1 batch of re-melting stock re-melting stock
29、of the same form, the same nominal dimensions and from the same parent-castEN2545-1:1995 4 BSI 12-1999 3.8.2 batch of castings castings of the same part number, from the same melting operation for EBM process or from the same electrode without alteration of the melting conditions for VAR process. Th
30、ey have been submitted together to hot isostatic pressing and, if applicable, to heat treatment 3.8.3 batch of scrap materials of the same type (see4.2), the same chemical composition and, if necessary, submitted to the same conditioning operations 3.9 inspection schedule see EN 2078 3.10 manufactur
31、ing schedule see EN 2078 3.11 inspection and test report see EN 2078 4 Quality assurance 4.1 Approval of the quality system of manufacturers See EN 2000. 4.2 Scrap approval Scrap shall be: prepared according to a procedure approved by the purchaser. The procedure shall include verification of chemic
32、al composition, freedom from contamination and the absence of foreign material; approved by: the scrap purchaser; the purchaser of remelting stock electrodes(VAR process), or the purchaser of the casting (EBM process). Additional requirements are given in EN2545-2 and in EN2545-3. 5 Manufacture 5.1
33、The method of melting shall be in accordance with EN2545-2 or EN2545-3. 5.2 The details of manufacture shall be recorded in the manufacturing schedule. 5.3 When a manufacturing schedule has been adopted, no change shall be made without the written agreement of the purchaser. 5.4 Unless otherwise agr
34、eed and stated on the drawing, order and/or manufacturing schedule, the product shall be delivered in the heat treatment condition specified in the material standard. 5.5 If a temperature (value and tolerance) is stated, that temperature shall be mandatory. If a temperature range is stated, a temper
35、ature within that range, reduced by the furnace tolerances, shall be selected to give the required properties. Unless otherwise specified, the furnace charge shall be maintained at the temperature subject to the tolerances inTable 1, for the period stated. Table 1 6 Traceability 6.1 Each remelting s
36、tock shall be traceable to its charge 6.2 Each casting shall be traceable to its charge and batch at all stages of manufacture and delivery. 7 Freedom from defects All remelting stock and castings shall be free from harmful defects. Notwithstanding previous acceptance complying with this standard, a
37、ny remelting stock or casting found, at a later stage, to contain such defects may be rejected. 8 Testing The tests required by the material standard, order, inspection schedule or drawing, shall be made in accordance with the relevant test standard. If a test standard does not exist, the method to
38、be used shall be agreed between the manufacturer and the purchaser. Unless otherwise stated on the drawing or inspection schedule, the frequency of testing shall be as specified in EN2545-2 or EN2545-3. The location of test samples shall be as indicated on the drawing or inspection schedule. The tes
39、t samples and corresponding test pieces shall be marked in such a manner as to ensure that their identity and location with respect to the product and the batch is maintained. 8.1 Chemical composition It shall conform with the material standard and shall be determined on each melt or parent-cast by
40、means of representative samples. Selected temperature Tolerances C C F 550 5 550 k F k 1 250 10EN2545-1:1995 BSI 12-1999 5 The method of analysis shall be selected by the manufacturer but in case of dispute, the method defined in the relevant ISO standard shall be used. If no ISO standard exists, a
41、fundamental method of chemical analysis shall be used. Elements not specified in the material standard shall not be added without the agreement of the purchaser. 8.2 Mechanical testing Preparation of test samples and test pieces: 8.2.1 If the test samples have to be heat treated this shall be done i
42、n accordance with the heat treatment for use condition specified in the material standard. 8.2.2 The mechanical test pieces shall be machined in the heat treatment for use condition in accordance with the requirements of the relevant EN standard. Their surface shall be absolutely free from contamina
43、tion. 8.2.3 The strain rate up to the proof stress shall be within the range of0,3%/min to0,7%/min. In case of dispute, a strain rate of0,5%/min shall be used. After proof stress, the speed may be increased up to5%/min or such that failure occurs within approximately1min. 8.3 Special tests Special t
44、ests and inspections may be required by the purchaser (e.g.micro and macro structure examination). In this case, after agreement between the purchaser and the manufacturer, the nature of test, methods, frequency, acceptance criteria and re-test procedure shall be specified on the order, drawing or i
45、nspection schedule. 8.4 Re-tests If any requirement is not met, re-tests shall be carried out under the following conditions: if the test procedure or test piece preparation is faulty, testing shall be re-applied at the original frequency after identification of the failure cause; if the incorrect r
46、esult cannot be attributed to faulty test procedure or test piece preparation, further test samples shall be taken but at twice the original frequency; at least one of the samples shall be taken from the product(s) on which the incorrect results were obtained (unless already rejected by the manufact
47、urer after suitable identification of the cause of failure). If all results are satisfactory, the batch shall be accepted. If one or more results are unsatisfactory, the batch shall be: rejected, or re-heat treated and tested as a new batch, except for chemical composition and radiographic examinati
48、on. 8.5 Re-heat treatment With the exception of stress relieving no product or test sample shall be re-heat treated more than twice without the agreement of the purchaser. 9 Marking See: EN 2545-2 for remelting stock; EN 2545-3 for castings. The frequency of examination adopted by the manufacturer s
49、hall be sufficient to permit him to certify compliance with the requirements. 10 Acceptance If required, the manufacturer shall inform the purchaser or his chosen agent of the planned dates for sampling and acceptance testing in order that these operations may be witnessed. 11 Inspection and test report The manufacturer shall furnish with each delivery, an inspection and test report conforming to the requirements of EN2078, and stating the following: manufacturers name and ad
